Have you never wondered how to save videos you see on youtube? I don't ... But i've found this plugin that deal with that.
Only for firefox by the way. If you still don't use it, hurry up, and shame on you!
You can customize the plugin a little (go in Tools/Add ons, and then click on "Preferences" at the VideoDownloadHelper line).
For ewample, display the icon in the status bar (instead of the navigation bar, that I figure ugly)
![[en]](http://blog.shinji.fr/content/img/flags/flag.en.gif)
![[fr]](http://blog.shinji.fr/content/img/flags/flag.fr.gif)